I agree re: biscuit, but I don't think that is dark enough for an amber. If you want the crystal in there, maybe 1lb C80, or .25 C40 and 1lb C80. You could also exchange some of that pale malt for Munich, and go 1/2 and 1/2 munich and pale, or 2/3 pale and 1/3 munich. Simplicity is nice though.